Add link to cluster install document
Add link to cluster install document

The pretty formatted ciao cluster installation document with pictures and
diagrams and whatnot will be hosted on the web outside of github at
https://clearlinux.org/documentation/ciao-cluster-setup.html.

Signed-off-by: Tim Pepper <8dbd764830e941d092a1cb7fa16423169acc0b04@linux.intel.com>

obedmr/ciao,obedmr/ciao,mcastelino/ciao,jorgevgut/ciao,wcwxyz/ciao,mcastelino/ciao,mrkz/ciao,leoswaldo/ciao,01org/ciao,chavafg/ciao,ciao-project/ciao,rbradford/ciao,jorgevgut/ciao,mcastelino/ciao,chavafg/ciao,tpepper/ciao,kaccardi/ciao,wcwxyz/ciao,matthewrsj/ciao,erick0z/ciao,wcwxyz/ciao,ciao-project/ciao,kaccardi/ciao,jorgevgut/ciao,matthewrsj/ciao,mrkz/ciao,markdryan/ciao,markdryan/ciao,mrkz/ciao,tpepper/ciao,tpepper/ciao,rbradford/ciao,01org/ciao,leoswaldo/ciao,erick0z/ciao,leoswaldo/ciao,matthewrsj/ciao,erick0z/ciao,obedmr/ciao